[/ezcol_1half][ezcol_1half_end]Dr. Richard Routledge of SFU Dept. of Environmental Sciences has downloaded the first data from the data logger installed in the fall of 2012 near the off-channel rearing pond. We are preparing to purchase two more data loggers with SFU and we will need volunteers to calibrate and check the equipment regularly. Email alan_james [at] handshake [dot] ca for details.[/ezcol_1half_end]

Note that the conductivity is high when the water level is low and low when it rains and the water level is high.The data comes in several values for each 15 minute time slice and needs reformatting to present in a graph:

05/22/2013

13:45:00

BATV

12.85

05/22/2013

13:45:00

WLPT12

0.244

05/22/2013

13:45:00

WTPT12

12.06

05/22/2013

13:45:00

WTEMP

11.94

05/22/2013

13:45:00

SPCOND

161

05/22/2013

13:45:00

PH

7.32

05/22/2013

13:45:00

TURB

10.8

05/22/2013

13:45:00

ODO%

96.7

05/22/2013

13:45:00

ODO

10.43

05/22/2013

14:00:00

BATV

12.85

05/22/2013

14:00:00

WLPT12

0.243

05/22/2013

14:00:00

WTPT12

12.06

05/22/2013

14:00:00

WTEMP

11.95

05/22/2013

14:00:00

SPCOND

162

05/22/2013

14:00:00

PH

7.32

05/22/2013

14:00:00

TURB

10.7

05/22/2013

14:00:00

ODO%

96.3

05/22/2013

14:00:00

ODO

10.39

05/22/2013

14:01:00

Tx

Good

[ezcol_1half]Here is some historical Water quality data from a data logger borrowed from DFO:[/ezcol_1half] [ezcol_1half_end]

[/ezcol_1half_end]

[ezcol_1half]Here is the record of John Templeton’s daily grab sample measurements:[/ezcol_1half] [ezcol_1half_end]

[/ezcol_1half_end]

[ezcol_1half]The next graph shows why continuous logging gives much more information than daily grab samples. The continuous curves show the conductivity decreasing quickly with higher water levels (salt-laden water is diluted with clean rainwater) and slowly climbing back in drier conditions. I have yet to explain the apparent 23 hour offset between the dip in conductivity and rise in water level. Any suggestions?( It was an error in parsing the data. See the plot below that shows the rain events in sync. )[/ezcol_1half] [ezcol_1half_end]

[/ezcol_1half_end]

[ezcol_1half][/ezcol_1half] [ezcol_1half_end] [/ezcol_1half_end]
[ezcol_1half]John received an Environmental Star award from the City of Burnaby.[/ezcol_1half] [ezcol_1half_end]